Title: Axial compressive behavior of square composite columns confined by multiple spirals
Authors: Liang, Ching-Yu
Chen, Cheng-Chih
Weng, Cheng-Chiang
Yin, Samuel Yen-Liang
Wang, Jui-Chen
土木工程學系
Department of Civil Engineering
Keywords: Composite column;Multiple spirals;Confinement;Axial load-carrying capacity
Issue Date: 1-Dec-2014
Abstract: This study elucidates experimentally and analytically the axial compressive load-carrying capacity and behavior of square composite steel and concrete columns confined by multiple interlocking spirals. The variables of the specimens included type of the lateral reinforcement (rectilinear hoops and multiple spirals), spacing of the lateral reinforcement, and shape of the structural steel section (cruciform and box-shaped). Specimens were tested under monotonically increased axial load. The test results demonstrated that the composite columns with multiple spirals achieved great axial load-carrying capacity and deformability because of the excellent concrete confinement attributed to the multiple interlocking spirals and the structural steel section. Smaller spacing of the spirals and larger area of the highly confined concrete in the composite columns resulted in the better strength and ductility of the columns. An analytical model was proposed to calculate the load-displacement relations of the specimens, and the model predicted well the behavior of the specimens. The effectiveness of the multiple interlocking spirals in the square composite columns was evident via this study. (C) 2014 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jcsr.2014.09.006
http://hdl.handle.net/11536/123873
ISSN: 0143-974X
DOI: 10.1016/j.jcsr.2014.09.006
Journal: JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
Volume: 103
Begin Page: 230
End Page: 240
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